EP1317617A1 - Verfahren und elektronische steuereinrichtung zur diagnose der gemischbildung einer brennkraftmaschine - Google Patents
Verfahren und elektronische steuereinrichtung zur diagnose der gemischbildung einer brennkraftmaschineInfo
- Publication number
- EP1317617A1 EP1317617A1 EP01971668A EP01971668A EP1317617A1 EP 1317617 A1 EP1317617 A1 EP 1317617A1 EP 01971668 A EP01971668 A EP 01971668A EP 01971668 A EP01971668 A EP 01971668A EP 1317617 A1 EP1317617 A1 EP 1317617A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mixture
- fuel
- tank ventilation
- internal combustion
- adaptation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3076—Controlling fuel injection according to or using specific or several modes of combustion with special conditions for selecting a mode of combustion, e.g. for starting, for diagnosing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
- F02D41/0032—Controlling the purging of the canister as a function of the engine operating conditions
- F02D41/0035—Controlling the purging of the canister as a function of the engine operating conditions to achieve a special effect, e.g. to warm up the catalyst
- F02D41/0037—Controlling the purging of the canister as a function of the engine operating conditions to achieve a special effect, e.g. to warm up the catalyst for diagnosing the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2454—Learning of the air-fuel ratio control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
- F02D41/3023—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the stratified charge spark-ignited mode
Definitions
- the invention relates to a method for diagnosing
- US Pat. No. 4,584,982 describes an adaptation with different adaptation variables in different areas of the load / speed spectrum of an internal combustion engine. The different adaption sizes are aimed at the compensation of different errors. Three types of errors can be distinguished according to cause and effect: Errors in a hot film air mass meter have a multiplicative effect on the fuel metering. Leakage air effects have an additive effect per unit of time and error in compensating the retarding of the injection valves, they have an additive effect per injection.
- emissions-related errors should be recognized with on-board means and, if necessary, an error lamp should be activated.
- the mixture adaptation is also used for fault diagnosis. If, for example, the corrective action of the adaptation is too great, this indicates an error.
- the diagnosis of the fuel supply system is linked to the mixture adaptation. This can only run with active lambda control, in particular not in operating modes in which lambda is only controlled (such as in shift operation with gasoline direct injection (BDE), in uncontrolled lean operation with BDE and intake manifold injection).
- active lambda control in particular not in operating modes in which lambda is only controlled (such as in shift operation with gasoline direct injection (BDE), in uncontrolled lean operation with BDE and intake manifold injection).
- the engine In shift operation, the engine is operated with a strongly stratified cylinder charge and a large excess of air in order to achieve the lowest possible fuel consumption.
- the stratified charge is achieved by a late fuel injection, which ideally leads to
- the combustion chamber is divided into two zones:
- the first zone contains a combustible air-fuel mixture cloud on the spark plug. It is surrounded by the second zone, which consists of an insulating layer of air and residual gas.
- the potential for optimizing consumption results from the possibility of operating the engine largely unthrottled while avoiding gas exchange losses. Shift operation is preferred at a comparatively low load.
- Cylinder filling operated.
- the homogeneous cylinder charge results from early fuel injection during the intake process. As a result, there is more time available for mixture formation until combustion.
- the potential of this operating mode for performance optimization results, for example, from the use of the entire combustion chamber volume for filling with a combustible mixture.
- the motor temperature must have reached the switch-on temperature threshold and the La bda probe must be ready for operation.
- the current values of load and speed must be determined in certain
- the invention aims to increase the period in which the engine can be operated in a shift-optimal manner.
- Switching to homogeneous operation for diagnosis reduces the fuel consumption of direct petrol injection, since homogeneous operation is less economical than shift operation.
- Switching to homogeneous operation unnecessarily increases fuel consumption when there is no fault. It should be avoided as far as possible without worsening the discovery of emissions-related errors.
- This desired effect is achieved with a method for diagnosing mixture formation in internal combustion engines with combustion chambers and with tank ventilation, in which the diagnosis is coupled to a mixture adaptation that only runs when the lambda control is active and in which outside the active lambda control an indication of a mixture or Probe error is detected by forming a suspected error with active tank ventilation and inactive mixture adaptation when a measure of the influence of tank ventilation on the mixture composition, which is formed under the assumption of an intact system, assumes implausible values, and when this suspicion exists, the mixture adaptation is requested in order to verify or falsify the suspicion if necessary.
- the internal combustion engine is operated with direct gasoline injection into the combustion chambers.
- Another measure provides that if there is an indication of a mixture or probe error (suspected error) during shift operation, a switchover to diagnostic operation for verification or falsification of the suspected error occurs in homogeneous operation.
- Another measure provides for use with a control device for controlling a tank ventilation system (12) and further functions for achieving efficient combustion of the fuel / air mixture in the combustion chamber, the tank ventilation system 12 having an activated carbon filter 15 which is connected to the tank via corresponding lines or connections, the ambient air and the intake manifold of the internal combustion engine, and has a tank vent valve 16 arranged in the line to the intake manifold.
- a pilot control value rk is formed for a fuel metering signal for fuel injection into at least one of the combustion chambers as a function of at least the rotational speed n and a signal ml about the amount of air sucked in by the internal combustion engine, with a mismatch of the amount of fuel to the amount of air in the signal Us maps an exhaust gas probe, from which a controller 2.3 forms a control manipulated variable fr, which reduces the mismatch by multiplying it with the pilot control value rk.
- Another measure provides for the formation of an adaptation intervention fra on the fuel metering signal formation by forming an average value frm of the control manipulated variable fr and by correcting the fuel metering signal formation with an adaptation intervention variable fra based on the mean value mentioned.
- Another measure provides that, in shift operation, there is no mixture adaptation, but tank ventilation does.
- the influence of the regeneration gas with active tank ventilation on the aggregation of the total fuel / air ratio is derived from the signal of a lambda sensor, from which the
- a further development provides that if the loading of the regeneration gas of the TE is outside a plausible range, the suspicion of error is set.
- the invention also relates to an electronic control device for carrying out the method according to the above methods and further developments for the diagnosis of mixture formation.
- the invention thus represents a method for diagnosing the mixture formation in internal combustion engines with tank ventilation, the diagnosis being coupled to the mixture adaptation and being able to run only when the lambda control is active.
- the mixture adaptation therefore does not run, in particular, in operating modes of the internal combustion engine in which lambda is only controlled.
- the method is characterized in that, outside of the active lambda control, an indication of a mixture or probe fault is also recognized in stratified or lean operation, in particular with BDE, but in principle also in lean operation with intake manifold injection. For this purpose, a suspected fault is formed when the tank ventilation is active and the mixture adaptation is not active. If a measure of the influence of the tank ventilation on the
- Mixture composition that is formed assuming an intact system assumes implausible values, the mixture adaptation is requested in order to verify the suspicion if necessary.
- the setting of a suspected error for the mixture in the TE is particularly advantageous in BDE engines, since it enables fault detection in both shift and homogeneous operation and thus enables the GA to be activated.
- the GA in turn requires active lambda control, ie homogeneous operation, so it cannot be activated in shift operation and therefore cannot detect an error. Switching to homogeneous operation for diagnostic purposes only takes place if there is reason to suspect an error. An undesirable restriction of shift operation is avoided.
- the 1 in FIG. 1 represents the combustion chamber of a cylinder of an internal combustion engine.
- the inflow of air to the combustion chamber is controlled via an inlet valve 2.
- the air is sucked in via a suction pipe 3.
- the amount of intake air can be varied via a throttle valve 4, which is controlled by a control unit 5.
- the control unit is supplied with signals about the driver's torque request, for example about the position of an accelerator pedal 6, a signal about the engine speed n from a speed sensor 7 and a signal about the amount ml of the intake air from an air flow meter 8 and a signal Us about the Exhaust gas composition and / or exhaust gas temperature supplied by an exhaust gas sensor 16.
- Exhaust gas sensor 16 can be, for example, a lambda sensor, the Nernst voltage of which
- the exhaust gas is passed through at least one catalytic converter 15, in which pollutants from the exhaust gas are converted and / or temporarily stored.
- control unit 5 From these and possibly further input signals via further parameters of the internal combustion engine such as intake air and coolant temperature and so on, the control unit 5 forms output signals for setting the throttle valve angle alpha by means of an actuator 9 and for actuating one
- Fuel injection valve 10 through which fuel is metered into the combustion chamber of the engine.
- the Control unit controls the triggering of the ignition via an ignition device 11.
- the throttle valve angle alpha and the injection pulse width ti are essential, coordinated manipulated variables for realizing the desired torque.
- Another important manipulated variable for influencing the torque is the angular position of the ignition relative to the piston movement.
- the determination of the manipulated variables for setting the torque is the subject of DE 1 98 51 990, which is to be included in the disclosure to this extent.
- control unit controls a tank ventilation 12 and further functions to achieve efficient combustion of the fuel / air mixture in the combustion chamber.
- the gas force resulting from the combustion is converted into a torque by pistons 13 and crank mechanism 14.
- the tank ventilation system 12 consists of an activated carbon filter 18, which communicates with the tank 20, the ambient air 17 and the intake manifold of the internal combustion engine via corresponding lines or connections, a tank ventilation valve 19 being arranged in the line to the intake manifold.
- the activated carbon filter 18 stores evaporating fuel in the tank 20.
- the tank ventilation valve 19 is activated by the control unit 5
- air is drawn from the environment 17 through the activated carbon filter, which releases the stored fuel into the air. This also as
- Tank ventilation mixture or also referred to as regeneration gas fuel-air mixture influences the Composition of the mixture supplied to the internal combustion engine as a whole.
- the proportion of fuel in the mixture is also determined by metering fuel via the fuel metering device 10, which is adapted to the amount of air drawn in.
- the fuel drawn in via the tank ventilation system can correspond closely to a proportion of approximately one third to half of the total fuel.
- Fig. 2 illustrates the formation of a
- Fuel metering signal based on the signals from FIG. 1 and the functioning of an adaptation.
- FIG. 2 shows the formation of the fuel metering signal.
- Block 2.1 represents a map which is addressed by the speed n and the relative air filling rl and in which pilot control values rk for the formation of the fuel metering signals are stored.
- the relative air filling rl is related to a maximum filling of the combustion chamber with air and thus to a certain extent indicates the fraction of the maximum combustion chamber or cylinder filling. It is essentially formed from the signal ml, rk corresponds to the fuel quantity assigned to the air quantity rl.
- Block 2.2 shows the known multiplicative lambda control intervention.
- a mismatch in the amount of fuel to the amount of air is shown in the signal Us of the exhaust gas probe.
- a controller 2.3 forms the control manipulated variable fr, which reduces the mismatch via the intervention 2.2.
- the metering signal for example a trigger pulse width for the injection valves, can already be formed from the signal corrected in this way in block 2.4.
- Block 2.4 thus represents the conversion of the relative and corrected fuel quantity into a real control signal taking into account fuel pressure, injector geometry, etc.
- Blocks 2.5 to 2.9 represent the known operating parameter-dependent mixture adaptation, which can have a multiplicative and / or additive effect.
- the circle 2.9 should represent these 3 possibilities.
- the switch 2.5 is opened or closed by the means 2.6, the means 2.6 being supplied with operating parameters of the internal combustion engine, such as temperature T, air mass ml and speed n. Means 2.6 in connection with the switch 2.5 thus enables an activation of the three mentioned adaptation options depending on the operating parameter range.
- the formation of the adaptation intervention fra on the fuel metering signal formation ⁇ is illustrated by blocks 2.7 and 2.8. With switch 2.5 closed, block 2.7 forms the mean value frm of the control variable fr. Deviations of the mean value frm from the neutral value 1 are transferred from block 2.8 to the adaptation intervention variable fra.
- the control manipulated variable fr initially approaches 1.05 due to a mismatch in the precontrol.
- the deviation 0.05 from the value 1 is transferred from block 2.8 to the value fra of the adaptation intervention.
- fra then goes to 1.05, with the result that fr goes back to 1.
- the adaptation ensures that mismatches in the pilot control do not have to be corrected every time the operating point changes.
- This adaptation of the adaptation size fra is carried out at high temperatures of the internal combustion engine, for example above a cooling water temperature of 70 ° Celsius with switch 2.5 then closed; Once adjusted, fra also acts on the formation of the fuel metering signal when switch 2.5 is open.
- the solution according to the invention is based on the fact that, in shift operation, there is no mixture adaptation, but tank ventilation does.
- the tank ventilation serves to equalize the pressure between the fuel tank and the environment, which is required, for example, when the fuel evaporates more due to heating or a decrease in the ambient pressure.
- the input variables of this calculation are the measured intake air quantity, the fuel quantity allocated via the injection valves and the out the control duty cycle for the tank ventilation valve and other boundary conditions.
- Regeneration gas amount a certain oxygen concentration in the exhaust gas.
- the desired load is obtained by calculation.
- This fuel component is the controlled variable of the tank ventilation, which is regulated to a setpoint to be specified as a function of the operating point. For example, 30% of the total amount of fuel should flow through the tank vent valve at a certain operating point, while the other 70% should be injected via fuel injection valves.
- this proportion of fuel is limited to predetermined limit values as a function of the total amount of fuel, for example to 50%. If there is no error, these limit values are not reached.
- a mixture or probe error outside the tank ventilation is interpreted as a loading of the regeneration gas when the tank ventilation is active. The actual load then does not match the calculated load. In this case the specified limit values can be reached. If, at the same time, the mixture control factor is not within a predetermined range around its normal position, this is interpreted as an indication of a mixture or probe fault and the fault is suspected. As soon as one of the limit values is reached, further opening of the tank ventilation valve is actively prevented.
- the mixture control factor is the factor for the mixture deviation formed in the tank ventilation phase (control factor of the lambda control multiplied by the ratio of the actual lambda value to the lambda setpoint). From the deviation of this factor from its neutral value (one), the loading of the regeneration gas is adapted and thus the fuel share of the tank ventilation in the total fuel.
- the mixture adaptation is requested. To activate it, switch to an operating mode with active lambda control, i.e. with BDE to homogeneous operation, and the tank ventilation is switched off. This ensures that an existing mixture error is adapted; if the adaptation values run against limit values, an error is entered. The previous suspicion is verified.
- the suspected error is reset after the mixture has been adapted.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10043859A DE10043859A1 (de) | 2000-09-04 | 2000-09-04 | Verfahren zur Diagnose der Gemischbildung |
DE10043859 | 2000-09-04 | ||
PCT/DE2001/003301 WO2002020969A1 (de) | 2000-09-04 | 2001-08-29 | Verfahren und elektronische steuereinrichtung zur diagnose der gemischbildung einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1317617A1 true EP1317617A1 (de) | 2003-06-11 |
EP1317617B1 EP1317617B1 (de) | 2006-02-15 |
Family
ID=7655156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01971668A Expired - Lifetime EP1317617B1 (de) | 2000-09-04 | 2001-08-29 | Verfahren und elektronische steuereinrichtung zur diagnose der gemischbildung einer brennkraftmaschine |
Country Status (9)
Country | Link |
---|---|
US (1) | US6739310B2 (de) |
EP (1) | EP1317617B1 (de) |
JP (1) | JP4700258B2 (de) |
KR (1) | KR20020068336A (de) |
DE (2) | DE10043859A1 (de) |
ES (1) | ES2257442T3 (de) |
MX (1) | MXPA02004305A (de) |
RU (1) | RU2002113762A (de) |
WO (1) | WO2002020969A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008007030B4 (de) | 2008-01-31 | 2019-07-11 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Überprüfung der Funktionsfähigkeit einer Tankentlüftungsvorrichtung für eine Brennkraftmaschine |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10043071A1 (de) * | 2000-09-01 | 2002-03-14 | Bosch Gmbh Robert | Verfahren zur Diagnose des Tankentlüftungsventils |
DE10215610B4 (de) * | 2001-04-10 | 2018-12-13 | Robert Bosch Gmbh | System und Verfahren zum Korrigieren des Einspritzverhaltens von mindestens einem Injektor |
DE10324813B4 (de) * | 2003-06-02 | 2015-12-31 | Robert Bosch Gmbh | Verfahren zur Diagnose eines Tankentlüftungsventils |
JP2008196441A (ja) * | 2007-02-15 | 2008-08-28 | Toyota Motor Corp | 車両の制御装置 |
DE102007053406B3 (de) * | 2007-11-09 | 2009-06-04 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Durchführung sowohl einer Adaption wie einer Diagnose bei emissionsrelevanten Steuereinrichtungen in einem Fahrzeug |
FR2923864B1 (fr) * | 2007-11-20 | 2010-02-26 | Renault Sas | Procede pour diagnostiquer l'etat d'un systeme d'alimentation en carburant d'un moteur. |
DE102007057693B3 (de) | 2007-11-30 | 2009-05-20 | Continental Automotive Gmbh | Tankentlüftungsvorrichtung für ein Kraftfahrzeug |
DE102008020928B4 (de) * | 2008-04-25 | 2014-04-17 | Continental Automotive Gmbh | Verfahren zum Regeln eines Luft-Kraftstoff-Verhältnisses und Verfahren zum Erkennen einer Kraftstoffqualität |
DE102009059662B4 (de) * | 2009-12-19 | 2014-03-13 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verfahren zur Diagnose von Leitungssystemen von Brennkraftmaschinen |
US10161351B2 (en) * | 2012-11-20 | 2018-12-25 | Ford Global Technologies, Llc | Gaseous fuel system and method for an engine |
DE102016211907A1 (de) * | 2016-06-30 | 2018-01-04 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Überwachung eines Kraftstoffversorgungssystems eines Kraftfahrzeugs mit einer Speichereinheit für gasförmige Kraftstoffbestandteile |
US11828210B2 (en) | 2020-08-20 | 2023-11-28 | Denso International America, Inc. | Diagnostic systems and methods of vehicles using olfaction |
US11932080B2 (en) | 2020-08-20 | 2024-03-19 | Denso International America, Inc. | Diagnostic and recirculation control systems and methods |
US11636870B2 (en) | 2020-08-20 | 2023-04-25 | Denso International America, Inc. | Smoking cessation systems and methods |
US11760169B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Particulate control systems and methods for olfaction sensors |
US12017506B2 (en) | 2020-08-20 | 2024-06-25 | Denso International America, Inc. | Passenger cabin air control systems and methods |
US11760170B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Olfaction sensor preservation systems and methods |
US11813926B2 (en) | 2020-08-20 | 2023-11-14 | Denso International America, Inc. | Binding agent and olfaction sensor |
US11881093B2 (en) | 2020-08-20 | 2024-01-23 | Denso International America, Inc. | Systems and methods for identifying smoking in vehicles |
CN112412667B (zh) * | 2020-12-04 | 2021-11-19 | 安徽江淮汽车集团股份有限公司 | 低脱附管路的诊断方法、诊断终端、车辆及存储介质 |
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DE4025544A1 (de) * | 1990-03-30 | 1991-10-02 | Bosch Gmbh Robert | Tankentlueftungsanlage fuer ein kraftfahrzeug und verfahren zum ueberpruefen deren funktionstuechtigkeit |
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JPH084569A (ja) * | 1994-06-22 | 1996-01-09 | Toyota Motor Corp | 内燃機関の蒸発燃料制御装置 |
US5754971A (en) * | 1995-02-10 | 1998-05-19 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Fault diagnosis apparatus for a fuel evaporative emission suppressing apparatus |
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2000
- 2000-09-04 DE DE10043859A patent/DE10043859A1/de not_active Withdrawn
-
2001
- 2001-08-29 KR KR1020027005716A patent/KR20020068336A/ko not_active Application Discontinuation
- 2001-08-29 DE DE50108959T patent/DE50108959D1/de not_active Expired - Lifetime
- 2001-08-29 EP EP01971668A patent/EP1317617B1/de not_active Expired - Lifetime
- 2001-08-29 RU RU2002113762/06A patent/RU2002113762A/ru not_active Application Discontinuation
- 2001-08-29 WO PCT/DE2001/003301 patent/WO2002020969A1/de active IP Right Grant
- 2001-08-29 ES ES01971668T patent/ES2257442T3/es not_active Expired - Lifetime
- 2001-08-29 JP JP2002525356A patent/JP4700258B2/ja not_active Expired - Fee Related
- 2001-08-29 MX MXPA02004305A patent/MXPA02004305A/es unknown
- 2001-08-29 US US10/129,403 patent/US6739310B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
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See references of WO0220969A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008007030B4 (de) | 2008-01-31 | 2019-07-11 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Überprüfung der Funktionsfähigkeit einer Tankentlüftungsvorrichtung für eine Brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
WO2002020969A1 (de) | 2002-03-14 |
MXPA02004305A (es) | 2003-01-28 |
JP2004508489A (ja) | 2004-03-18 |
DE50108959D1 (de) | 2006-04-20 |
ES2257442T3 (es) | 2006-08-01 |
KR20020068336A (ko) | 2002-08-27 |
RU2002113762A (ru) | 2004-01-20 |
US6739310B2 (en) | 2004-05-25 |
EP1317617B1 (de) | 2006-02-15 |
JP4700258B2 (ja) | 2011-06-15 |
DE10043859A1 (de) | 2002-03-14 |
US20030075140A1 (en) | 2003-04-24 |
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